#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 0.0 0.0 26.957595348358158 57.559841776171915 -gcp 10479.0 0.0 26.957724094390873 57.53429724131876 -gcp 10479.0 10476.0 26.908779144287113 57.53403807721267 -gcp 0.0 10476.0 26.910023689270023 57.560267654454464 Aluksne-1989-1185/Aluksne-1989-1185-65.jpg Aluksne-1989-1185-65.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "975.0 987.0\n985.5 9425.25\n9465.0 9396.0\n9456.0 954.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-65.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-65.vrt Aluksne-1989-1185-65.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-65.cut.vrt Aluksne-1989-1185-65.xyz